Question about Philips 26MF605W/17 Television
Tv had blown fuse and main switching transistor was shorted. Replaced w/ original part. Screen comes up and looks good. When backlight turns on, main xformer squeals. +24v has a tiny ripple. +18v ? drops to 16 when on. The last tv I saw w/ this power supply also had the sagging 18volts. If it is 18.
You need a higher capcitor as far as voltage if you got a sag, A power supply making noise is not a verry good sign period and this is dcomming from a eletronics engineer! There is something wroung with the circuit. I would sugges changing out the power supply unit due to a possiable problem with the rails.
Posted on Jun 17, 2009
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Posted on Jan 02, 2017
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Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
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